How much vitamin B complex do you need?

 The recommended daily amount of each B vitamin varies.

According to the National Institutes of Health (NIH)Trusted Source, the recommended daily intake for women is:

• B1: 1.1 milligrams (mg)
• B2: 1.1 mg
• B3: 14 mg NE
• B5: 5 mg
• B6: 1.3 mg
• Biotin: 30 micrograms (mcg)
• Folic acid: 400 mcg DFE
• B12: 2.4 mcg

For men, the NIH recommends the following daily intake:

• B1: 1.2 mg
• B2: 1.3 mg
• B3: 16 mg NE
• B5: 5 mg
• B6: 1.3 mg
• Biotin: 30 mcg
• Folic acid: 400 mcg DFE
• B12: 2.4 mcg

Older adultsTrusted Source and those who are pregnant may require higher amounts of B vitamins. Your doctor can provide dosage information tailored to your individual needs.

Certain underlying health conditions can prevent your body from properly absorbing vitamin B. You should also talk with your doctor about your vitamin B intake if you have:

• celiac disease
• HIV
• Crohn’s disease
• alcohol use disorder
• kidney conditions
• rheumatoid arthritis
• ulcerative colitis
• inflammatory bowel disease